• Dredging project on track at Solana Beach

    The U.S. Army Corps of Engineers Los Angeles District's dredging operations and sand replenishment project at Solana Beach is about halfway complete.
  • Mobile District teams work to repair Demopolis Lock

    Teams throughout the Mobile District mobilized and sent vessels and crews to the Demopolis Lock and Dam in Demopolis, Alabama, Feb. 3, 2024, to repair the lock.
  • Overview of Microscale Analytical Methods for the Quantitative Detection of Bioaccumulative Contaminants in Small Tissue Masses

    Abstract: For many bioaccumulation studies, generation of large sample masses of exposed organisms is challenging or even prohibitive. Therefore, the use of smaller sample masses for analysis without compromising data quality or quantitative level achieved is desirable. To this end, a variety of microanalytical procedures have been developed that used 1 g or less of tissue to address specific experimental challenges. However, these methods have not been systematically evaluated or published. The present work evaluates the current state of the microanalytical methods reported and identifies additional needs that would benefit US Army Corps of Engineers (USACE) research and navigation dredging programs. Discussions with commercial laboratories revealed that they typically do not accept small sample masses and require individual sample masses ranging from 10 to 20 g wet weight of tissue per analysis. If they do analyze a small mass sample, they routinely do not modify their standard process, resulting in detection and reporting limits orders of magnitude higher; therefore, essentially useless nondetect data are generated for regulatory decisions. To address the lack of commercial availability of microanalytical methods, we recommend pursuing method development and subsequent validation of microscale extraction and analysis of a variety of common contaminant compounds in tissue matrices.
  • MKARNS Nav Notice No. SWL 24-16 Lock 2 Opened

    Crews have completed the upgrades to the lock interlock system at Lock No. 2 (NM 13.3), as communicated in Navigation Notice No. SWL 24-02, and the lock is now open to traffic.
  • USACE solicits public comments for a new waterline for the fish hatchery at Fort Peck Dam, Montana

    The U.S. Army Corps of Engineers, Omaha District is soliciting comments regarding the proposed implementation of a new waterline at the Fort Peck Fish Hatchery.
  • MKARNS Nav Notice No. SWL 24-15 Lock 13 Intermittent Delays

    Mariners should expect to experience intermittent delays at James W. Trimble Lock (No. 13) NM 292.8 on February 9, 2024, between the hours of 7:00 a.m. and 11:00 a.m. The intermittent delays are required to facilitate replacement of hydraulic piping.
  • USACE awards $4.5M contract to design the Modified Central City Trinity Point, Tarrant Regional Water District, and Clear Fork Flood Gates and TRWD Pump Station

    Today, the U.S. Army Corps of Engineers, Fort Worth District, awarded an architect-engineer contract to Black and Veatch-GEI Joint Venture, totaling $4.5 million, to update the conceptual designs and perform the necessary physical and hydraulic modeling for three flood gates and one pump station in support of the Modified Central City Project. The flood gates will be closed during large system events to divert flood waters through the bypass channel.
  • Public scoping meeting to be held for Hillsdale Lake Master Plan revision

    Officials will hold a public scoping meeting to discuss the Master Plan revision for Hillsdale Lake on February 29, 2024. The Kansas City District, U.S. Army Corps of Engineers has begun the process of revising the Hillsdale Lake Master Plan, which was last updated in March 1978. The revision will bring the Master Plan up to date with current policy and regulations, land usage or designations, as well as consider current and projected visitation or recreational trends.
  • USACE seeks comments on proposed work in wetlands and waterways off Route 78 in Swanton, Vermont

    The U.S. Army Corps of Engineers, New England District received a permit application to conduct work